Just one day after praising her "gurl" Miley Cyrus on Twitter, Ke$ha seemed to vow to compete with her to see who could dress the most provocatively.

Starting off strong, the "Tik Tok" singer posted a photo on Thursday (October 3) of herself on all fours, wearing skimpy lingerie and baring most of her backside. Eloquently, she captioned the pic, "butt."